Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Analysis of Jet-drop Distance from the Multi Opening Slots of Forced-ventilation Broiler House

강제 환기식 육계사 다중 입기 슬롯에서의 입기류 도달거리 분석

  • 권경석 (서울대학교 농업생명과학대학 지역시스템공학과 & 농업생명과학 연구원) ;
  • 하태환 (서울대학교 농업생명과학대학 지역시스템공학과 & 농업생명과학 연구원) ;
  • 이인복 (서울대학교 농업생명과학대학 지역시스템공학과 & 농업생명과학 연구원) ;
  • 홍세운 (서울대학교 농업생명과학대학 지역시스템공학과 & 농업생명과학 연구원) ;
  • 서일환 (서울대학교 농업생명과학대학 지역시스템공학과 & 농업생명과학 연구원) ;
  • Received : 2012.01.16
  • Accepted : 2012.03.06
  • Published : 2012.03.31
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Abstract

In the winter season, when the ventilation system is operating, the fresh cold air from the slot-type openings of broiler house which directly reached the animal zone can cause various problems such as thermal stress, decreasing of feed and water consumption, occurrence of respiratory disease, and etc. Therefore it is very important to control the trajectory of aero-flow from the slot openings to induce an efficient thermal heat change. Jet-drop distance model was proposed to predict and control the jet-trajectory. However their study was restricted due to the small scaled model and difficulties of measuring the Jet-drop distance. In this study, CFD was applied to analyze qualitatively and quantitatively the jet-drop distance in a real broiler house. The various variables were considered such as installed slot-angle, designed ventilation rate, and the outdoor ambient temperature. From the present study, two linear-regression models using the Jet-drop factor and corrected Archimedes number, and their R-squared values 0.744 and 0.736, respectively, were used. From this study, the applicability of CFD on the analysis of Jet-drop distance model was confirmed.

Keywords

References

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